1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108520ac8c12e836a920c22d99c91c915eb329f31c551d3db329f9e763f4b2f8. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ab33b65-2de4-4b21-b957-61b78bd8d48e.json and https://artists.proofprofile.net/proofs/artist/9ab33b65-2de4-4b21-b957-61b78bd8d48e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d48f5d17799fdac520f516096d525e02afe2b1f4c79eb967f65c42ff606a6d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARIXB2309172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90537ac08f7b91adc8ef69c2a2522fb564a76e4cbf96b6cb6a2f1aebd4be38e3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARIXB2309552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b8731d3ac5c30f88615093ca9999902ebf60f9c1ea9f00b0cb5b0c50c3edc4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARIXB2309553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c725a213795ab433b4a2c07feec2ef2ae4b14f7de0d755eae5000cf3cea2e55. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARIXB2309556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc88e25712f1cd434cc949e1bdb6b2b71e9fd9354af21e63a168a75586a9e38. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARIXB2309560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2779c2a0df5e641baf345156f797619be04ae25cb05707f5121ddd1bc70bbaf. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:34:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARIXB2309561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6b3140d899519fb977bc5266606380e49749d25670b3b3c1c9a36bc2de39c7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARIXB2309563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc88e25712f1cd434cc949e1bdb6b2b71e9fd9354af21e63a168a75586a9e38. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARIXB2309560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2779c2a0df5e641baf345156f797619be04ae25cb05707f5121ddd1bc70bbaf. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARIXB2309561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6b3140d899519fb977bc5266606380e49749d25670b3b3c1c9a36bc2de39c7. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARIXB2309563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90537ac08f7b91adc8ef69c2a2522fb564a76e4cbf96b6cb6a2f1aebd4be38e3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARIXB2309552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b8731d3ac5c30f88615093ca9999902ebf60f9c1ea9f00b0cb5b0c50c3edc4. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARIXB2309553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c725a213795ab433b4a2c07feec2ef2ae4b14f7de0d755eae5000cf3cea2e55. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARIXB2309556.